During the epidemic, many people put on masks and put on gloves to ensure that they were “non-infectious.” I usually press the elevator button that I have been pressing. Now I feel terrified when I touch it. The door handle, which is commonplace, is polished with disinfectant every day. Many people can’t help but ask, how long can the new coronavirus survive on these common items? How much do you know about ABC of New Coronavirus?

How long can the new coronavirus live on common items?

A few days ago, a joint team from the National Institutes of Health, the National Center for Immunity and Respiratory Diseases, Princeton University, and the University of California, Los Angeles, and other top international scientific research institutions published a preprinted article in Medrxiv that specifically studied the new coronavirus on aerosols and materials Viability.

The experimental results show that under normal air humidity and temperature conditions, the new coronavirus can survive on the copper surface for at least 4 hours, survive on the cardboard for 24 hours, and survive longer on the surface of polypropylene plastic and stainless steel, reaching 72 hours. In an aerosol environment with higher humidity, the new coronavirus can also survive for more than 3 hours.

What is the difference between New Corona virus and Influenza virus

According to the daily epidemic report released by the World Health Organization on the evening of March 6, although the new coronavirus and influenza virus can cause respiratory diseases, there is an essential difference between the two:

First, the propagation speed is different. New coronary pneumonia spreads slower than the flu, but the median incubation period is longer.

Second, the time for patients to spread the virus is different. Influenza virus transmission mainly occurs within 3 to 5 days after the patient begins to show symptoms, and may also spread before the symptoms appear. In contrast, although some new cases of coronary pneumonia can spread the virus 24 to 48 hours before the onset of symptoms, this is not currently the case.

Third, the infectivity is different. According to the evaluation of the number of basic infections, the new coronary pneumonia is more contagious than the flu.

Fourth, the proportion of severe cases is different. Data to date shows that 80% of people infected with the new coronavirus are mild or asymptomatic, 15% are severe infections, and 5% are extremely severe infections. The proportion of severe and very serious infections is higher than that of influenza.

Fifth, there are certain differences among susceptible people. The main risk groups for influenza include children, pregnant women, the elderly, people with other chronic diseases, and people with immune system problems. For new coronary pneumonia, current research indicates that the elderly and those with other diseases face a higher risk of serious infections.

Sixth, the mortality rate is different. Although it will take some time to determine the mortality rate of new coronary pneumonia, the current data shows that the mortality rate of new coronary pneumonia is about 3% to 4%, while the mortality rate of seasonal influenza is usually far below 0.1%.

Seventh, medical interventions are different. There are currently antiviral drugs and vaccines available for influenza, but there are currently no new coronary pneumonia vaccines or treatments that are licensed.

How do individuals guard against the new crown virus?

World Health Organization Director-General Tan Desai said at a regular press conference on February 28, “Containing the epidemic begins with you.” WHO gives 10 basic recommendations for personal precautions against the new coronavirus.

First, wash your hands regularly with a hand-washing liquid containing alcohol, or wash your hands with soap and water. Hand contact with contaminated objects or patients before touching the face is one of the ways of virus transmission, so cleaning your hands can reduce the risk of virus transmission.

Second, regularly use disinfectants to clean the surface of items, such as kitchen tables, chairs and desks.

Third, self-learn about the new coronavirus pneumonia, but ensure that the information comes from reliable sources such as local or national public health agencies, the WHO website, and local health professionals. For most people, the initial symptoms after infection with the new coronavirus are fever and dry cough, not runny nose. Most infected people are mild and can get better without any special care.

Fourth, avoid traveling during a fever or cough. If you become ill during the flight, you should immediately notify the crew. Immediately after returning home, you should contact the medical staff and tell them where you have been.

Fifth, cover your sleeves or tissues when coughing or sneezing. Tissues should be thrown into a closed trash bin immediately after use, and then wash your hands.

Sixth, people over 60 years of age or those with underlying diseases such as cardiovascular disease, respiratory disease, and diabetes may have a higher risk of serious illness after being infected with the new coronavirus. Such people should take extra precautions, such as avoiding crowded places or places that may interact with patients.

Seventh, if you feel uncomfortable, please stay at home and call your doctor or local medical staff. They will ask about your symptoms, where you have been, and who you have been in contact with. This will help to get the right advice or go to the right health care facility according to the guidelines, and prevent infections to others.

Eighth, stay at home when you are sick, separate meals and sleep from your family, and use different utensils.

Ninth, if you have shortness of breath, you should seek medical attention immediately.

Tenth, feeling anxious during the epidemic is normal and understandable, especially when living in a country or community affected by the epidemic. Please understand the community’s measures to prevent and control the epidemic, and discuss how to ensure safety in the workplace, schools, etc.

The new corona virus may exist for a long time, how can we prevent it?

Wang Chen, vice president of the Chinese Academy of Engineering and a medical expert in respiratory and critical illness, said that the new coronavirus may coexist with humans like the flu virus. To this end, we must make corresponding preparations in clinical diagnosis and treatment and production and life prevention.

Ke Huixing, deputy director and chief physician of the Department of Respiratory and Critical Care Medicine at Beijing Hospital, introduced that the basic law of virus evolution is “to keep co-evolution with the host.” The virus splits into the main propagation mode, and its basic purpose of entering the host is to obtain the material and energy it needs from the host. This “action” can cause human illness and even death. But from the perspective of viruses, in order to ensure that energy can be obtained from the host for a long time, they need to adapt to the environment of different hosts. Therefore, the virus will mutate during the reproduction process, so that it can stay in the human body longer and can spread.

The “strategy” adopted by the new coronavirus this time is low toxicity and high infectivity, which gives them more opportunities to infect humans and survive patients who depend on the infection for a long time. With the deepening of people’s understanding of the new coronavirus, the development and application of vaccines and the discovery of special drugs, people’s immunity to the new coronavirus will also increase. With all these factors combined, in the future, new coronary pneumonia may be a preventable and controllable disease like the current flu.

Ke Huixing said that in the short term, the toxicity of the new coronavirus will not be reduced to the level of influenza virus. Even if it does exist for a long time, we do not need to panic. Just make some adjustments in public health and personal protection, it will be very good. response. For example, in the clinical aspect, improve the infectious disease prevention and control system, especially the reporting system and epidemic prevention measures, and set up more infectious disease hospitals and wards; in terms of social life, wearing masks, washing hands frequently, and ventilating should become people ’s lives. Normally, try not to arrange or participate in crowded activities during peak periods of the epidemic.


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